Trim margins and crop pages of any PDF. Drag a crop box on the live preview, choose one page or all pages — fast, private and fully browser-based.
Select a PDF to trim its margins — or drag & drop
Dudi Crop PDF is a fast, 100% free, browser-based tool from Dudi PDF Editor that trims margins and crops pages of any PDF document in seconds. Whether you want to remove thick white borders from a scanned book, crop a wide slide export down to its content area, trim the empty space around a contract page, isolate a chart from a report, or clean up an image-heavy PDF for printing, this tool does all of it without installing software, creating an account, verifying an email or paying any hidden fee. Unlike most online PDF croppers, your file is never uploaded to a remote server. The entire process runs inside your browser using the pdf.js and pdf-lib JavaScript libraries — your PDF is rendered page by page so you can see exactly what you are trimming, the crop box is applied in memory, and the finished file stays on your device until you press the Download button. That means your confidential reports, legal contracts, invoices, academic papers and internal company files never leave your computer or phone. There is no signup, no watermark added by us, no daily limit and no page-count restriction beyond your device's memory. The interface is built around a live visual preview. As soon as you upload a PDF, Dudi Crop PDF renders the first page on a canvas and places a draggable crop box on top of it. You can drag the whole box to reposition it, or pull any of the four corner handles to resize it freely. A live readout shows the current crop coordinates and dimensions in PDF points, so you always know exactly how much is being kept. If you need to reposition the crop on a different page, use the Prev and Next buttons to navigate through the document — every page uses the same preview scale so the crop box remains consistent across pages. You can choose whether to apply the crop to every page (perfect for uniform margins across a scanned document) or to the current page only (perfect for a one-off crop on a specific sheet). A Reset Crop Box button puts the crop box back to a sensible default so you can start fresh at any time. The crop itself is applied as a crop box on the PDF structure, which means the underlying content is never re-encoded or re-compressed — everything stays exactly as it was, just visually trimmed to the area you selected. The output opens correctly in Adobe Acrobat, Chrome, Edge, Safari, Firefox and every common PDF reader, and printing respects the new crop size so your pages come out clean. Because the tool never downloads automatically, nothing is saved to your disk until you choose it: after the crop is processed, a Download button appears and you decide when to save the file. The downloaded file is always named Dudi PDF Editor Crop PDF.pdf, and if you crop another file in the same session it becomes Dudi PDF Editor Crop PDF (2).pdf and so on, so your files stay clearly identifiable. The layout is fully responsive, so the preview, crop handles, page navigation and action buttons all stay easy to use on a small Android phone as well as on a large desktop monitor — and the crop box supports touch dragging. After the first page load the libraries are cached, so the tool often keeps working even on a weak connection. If you need more tools, Dudi PDF Editor also offers Delete Pages, Add Blank Page, Extract Images, Merge PDF, Split PDF, Rotate PDF, PDF Page Numbers, Sign PDF, Protect PDF, Unlock PDF, Watermark PDF, Word to PDF, JPG to PDF, editing, OCR, image conversion and many other privacy-first utilities that all run locally in your browser with the same no-upload guarantee.